Woven-wire belt for paper-making machines



Sept. 1, 1931 N. w. WEBB 1,821,454

WOVEN WIRE BELT FOR PAPER MAKING MACHINES Filed Dec. 12, 1929 IINVENTOR. NEL50NNNEBB. %M; ATTORNEY.

Patented Sept. 1, 1931 UNITED STATES PATENT OFFICE NELSON W. WEBB, OFIBELLEVILLE, NEW JERSEY, AS SIGNOR TO EASTWOOD WIRE CORPORATION, OFBELLEVILLE, NEW JERSEY, A CORPORATION OF NEW JERSEY WOVEN-WIRE BELT ronPAPER-MAKING MACHINES Application filed December 12, 1929. Serial No.413,574.-

The present invention relates to woven wire belts, particularly forpaper-making machines of the Fourdrinier type, and has for an object toprovide an improved seam structure for wire of the so-called twill weavetype, and as disclosed in the patent to Kufierath, #617,581 datedJanuary 10,

1899, it being proposed in the present inventlon to so arrangelacingwires as t0 1Q closely approximate the structure of the body ofthe wire as to strength, flexibility and porosity, and also to provlde aseam which will be practicable and economical to produce.

Another object is to provide lacing wires in such relation to theknuckles of the wire mesh that there will be no projection of the lacingwires, and the latter will therefore be protected against excessive Wear29 and breakage through engagement with the suction boxes over which thewire passes. A further object is to provide a seam in which lacing wiresare looped about the end weft wires, which are integrally connected tothe warp wire ends in such manner that the lacing wires need not becarried back into the body of the wire mesh, or combined with whippingwires, such as have heretofore been employed, to retain the end weftwires against pulling out or displacement.

In sewing the lacing wires relatively short pieces must be employed toenable the person doing the work to thread the lacing wire through thewire mesh without difficulty, and the ends of such short pieces are tledinto the mesh, at the point where one piece ends and the next starts.Under great strain these ties are apt to loosen, and it is a furtherobject of the invention to provide a scam in which the lacing wires areso arranged as to reinforce the ties. To this end it is proposed toprovide a plurality of lacing wires arranged in such relation that theties of one mm are between the ties of another wire, so that each tiepoint is reinforced by an' unbroken intermediate portion of a lacingwire.

A With the above and other objects in view, an embodiment of the ivention is shown in the accompanying drawings, and this embodiment willbe hereinafter more fully described with reference thereto, and theinvention will be finally pointed out in the claims.

In the drawings:

Fig. 1 is an enlarged plan view of the upper side of a belt at the seam,with portions broken away;

Fig. 2 is a similar view of the under side, the lower portion shown inFig. 1 not being shown; and i Fig. 3 is a sectional view taken along theline 3-3 of Fig. 1.

Similar reference characters indicate corresponding parts throughout theseveral figures of the drawings.

Referring to the drawings, Fig. 1 shows, greatly enlarged a portion ofthe two ends of the wire cloth which are seamed together to form a belt,sections of the wire between the three lacing wire ties illustratedbeing broken away for clearness. The portlon as shown, and with thebroken away portions replaced, represents a piece of the belt which inits actual size is about 2 inches long, there being about warp wires tothe inch. The wire cloth consists of warp wires 10 and weft wires 11 ofbrass, bronze or other suitable material for the purpose.

The particular type of weave illustrated is known as twill weave, and inwhich the warp wires 10 are carried over one and under two of the weftwires, while the weft wires 11 are carried over two and under one of thewarp wires. Obviously the warp ends have different relations to the endweft wire, certain of them being carried over it and under the next weftwire, others beingunder it and over the next weft wire, and still othersbeing carried under it and also under the next weft wire, so that therevis a greater tendency for these latter to spread and permit pulling anddisplacement of the end weft wire under strain. In order to prevent thisit has been the practice to provide a, whipping wire about the end weftwires, and also to carry the lacing wire loodps about weft wires removedfrom the en I propose to obviate this, and at the same time enable thelacing wires to be carried about the end weft wires, and to this end Ipreferably employ an end weft wire of the type disclosed in my PatentNo. 1,747,274, granted February 18, 1930, and which consists of a soldercoated wire 12 of elongated cross-section inserted between the warp wireends in substitution of a removed weft wire. The solder coated wire isjoined to the warp wire ends by the application of heat, which causesthe solder to flow to the warp wire ends to integrally join and trussthem, the interstices between the wires being at the same timemaintained uniformly free of lumpy spots, because of the capillary flowof the metal away from them. These integrally joined end weft wires ofelongated cross-section are particularly suited to twill weave wire,because of the relatively long junction point with the warp wire ends,whichstiffens the loose warp ends against bowing or bending away fromthe belt surface, and the secure connection of these ends to the endweft wire.

The seam is now completed by sewing the lacing wires about the twobutted ends of wire cloth, the lacing wires being preferably of slightlysmaller diameter than the warp and weft wires 10 and 11, so that theywill not project beyond the surface of the belt.

Two lacing wires 13 and 14 are employed, the lacing wire 13 beingcarried about the end weft wire 12 at the left, Fig. 1, downwardlythrough the opening between an overlying warp wire end and the adjacentunderlying warp wire end below it, across the seam opening at the underside, and about the end weft wire 12 at the right upwardly through theopening between the two adjacent underlying warp wire ends, and thenacross the seam opening at the upper side, and continued in the samemanner throughout the length of the seam.

The lacing wire 14 which may be sewed in by a second operator workingright behind the first operator, is in substantially parallel and spacedrelation to the wire 13, being carried about the end weft wire at theleft, Fig. 1, downwardly through the opening between the two adjacentunderlying warp wire ends. across the seam opening at the under side,and about the end weft wire 12 at the right upwardly through the openingbetween the overlying warp wire end and the next adjacent underlyingwarp wire end.

As it is necessary to use relatively short pieces of wire to permit thesewing to be done conveniently. and without producing kinks. the wiresmust be tied at their ends. The ties of the wire 13 are indicated at 1and the ties of the wire 14 at 16, the same being alternately arranged,so that the ties 16 are at points substantially midway between the ties15, while the ties 15 are at points substantially midway between theties 16. The ties are produced by looping the end of the wire about oneof the weft wires removed from the end and at one side of the seam, andlooping the starting end of a new piece of wire about one of the weftwires removed from the -end and at the other side of the seam, and thencontinuing the sewing with the new piece of wire in continuation of thesewed-in piece of lacing wire. It will be understood of course thatother forms of ties may be employed.

By this alternate arrangement of the ties the same are reinforcedagainst pulling strains, and the lacing wires present a continuousunbroken lacing at every point throughout the seam, and any tendency topull out or loosen at the tie points is prevented.

The provision of the two lacing wires, both carried about the integrallyconnected endweft wires, provides a seam for twill weave wire mesh ofgreat strength, and having the desirable features of porosity,flexibility and structural afiinity with the body of the wire mesh. Thearrangement of the lacing wires is such that at no point do they extendover the warp wire ends, but are carried between them so that there areno projecting portions that might be cut off, or subjected to excessivewear, through contact with the suction boxes. The

freedom of the seam from whipping wires,

and lacing wires carried back into the body of the wire mesh about weftwires removed from the ends, assures a firm, uniform, narrow seam whichwill not produce objectionable marking on the paper or causeaccumulation or piling up of pulp at the seam.

I have illustrated and described a preferred and satisfactory embodimentof the invention, but it will be obvious that changes may be madetherein, within the spirit and scope thereof as defined in the appendedclaims.

Having thus des ribed my. invention what I claim and desire to secure byLetters Patent is 1. In a wire cloth belt, a length of woven wire clothcomprising warp wires and weft wires, the warp wires having portionsextending under a plurality of weft wires at one side. said length ofcloth having its ends adjacent. and a plurality of lacing wires carriedabout the end weft wire at each end of the cloth and extending betweensaid ends, said lacing wires being carried through adjacent intersticesand skipping one interstice at each end of the cloth.

2. In a wire cloth belt, a length of woven wire cloth compr sing warpwires and weft adjacent, and a plurality of lacing wires carried aboutthe end weft wire at each end of the cloth and extending between saidends, one of said lacing wires being carried through interstices at oneend of the cloth between two adjacent warp wire ends disposed at thesame side of the end weft wire.

3. In a wire cloth belt, a length of woven wire cloth comprising warpwires and weft wires, the warp wires having portions extending under aplurality of weft wires at one side, said length of cloth having itsends adj agent, and a plurality of lacing wires carried about the endweft wire at each end of the cloth and extending between said ends, oneof said lacing wires being carried through interstices at one end of thebelt between two adjacent warf wire ends disposed at the same side ofthe end weft wire, the other lacing wire being carried throughinterstices at the other end of the cloth between two adjacent warp wireends disposed at the same side of the end weft wire.

4. In a wire cloth belt, a length of woven wire cloth comprising warpwires and weft wires and having its ends adjacent, and a seam comprisinga plurality of lacing wires carried about weft wires and extendingbetween said ends, each of said'lacing wires comprising a plurality ofsections having ties at their ends, the ties of one wire being disposedat points intermediate the ties of the other wire.

Signed at Belleville, county of Essex, and State of New Jersey, thisletday of November, 1929.

NELSON W. WEBB.

